Clearing Cmos Settings; Power Management - Dell Precision 390 User Manual

11. Replace the computer cover. See
NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug it into the computer.
12. Connect your computer and devices to electrical outlets, and turn them on.
NOTE: This procedure enables the password feature. When you enter system setup, both system and administrator password options appear as Not
Set—meaning that the password feature is enabled but no password is assigned.
13. Assign a new system and/or setup password.
Clearing CMOS Settings
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
1. Follow the procedures in Before You
2. Remove the computer cover (see
3. Reset the current CMOS settings:
a. Locate the password (PSWD) and (RTCRST) jumpers on the system board (see
b. Remove the password from its pins.
c. Place the password jumper plug on the RTCRST pins and wait approximately 5 seconds.
d. Remove the jumper plug from the RTCRST pins and place it back on the password pins.
4. Replace the computer cover. See
NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug it into the computer.
5. Connect your computer and devices to electrical outlets, and turn them on.
Power Management
Your computer can be set to use less power when you are not working. You control the power usage through the operating system installed on your computer
and certain option settings in system
Standby — In this sleep state, power is reduced or turned off for most components, including the cooling fans. However, system memory remains
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active.
NOTE: All components installed in the computer must support this feature and have the appropriate drivers loaded to enter standby. For more
information, see the manufacturer's documentation for each component.
Hibernate — This sleep state reduces power consumption to a minimum by writing all data in system memory to a hard drive and then removing system
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power. Waking up from this state restarts the computer, and the memory contents are restored. Operation then resumes where the computer left off
when it entered the hibernation state.
NOTE: All components installed in the computer must support this feature and have the appropriate drivers loaded to enter hibernation. For more
information, see the manufacturer's documentation for each component.
Shutdown — This sleep state removes all power from the computer except a small auxiliary amount. As long as the computer remains connected to an
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electrical outlet, it can be automatically or remotely started. For example, the Auto Power On option in
automatically start at a specified time. Also, your network administrator can remotely start your computer using a power management event such as
Remote Wake Up.
The following table lists the sleep states and the methods you can use to wake the computer from each state.
Sleep State Wake-Up Methods (Windows XP)
Standby Press the power button
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Auto power on
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Move or click the mouse
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Type on the keyboard
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USB device activity
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Power management event
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Replacing the Computer Cover.
Begin.
Removing the Computer Cover).
Replacing the Computer Cover.
setup. These periods of reduced power are called "sleep states":
System Board Components).
system setup allows the computer to